The Blackthorn is a classic cocktail that combines the bold flavors of Irish Whiskey, Sweet Vermouth, and Absinthe. The absinthe provides a slight anise flavor which is complemented by the sweetness of the vermouth. The whiskey gives this drink a nice kick that is sure to please any whiskey lover. The Blackthorn was created during the 19th century in New Orleans, Louisiana, and has been a favorite of bartenders and drinkers alike for over 100 years. So, if you're looking for a delicious cocktail that is sure to please, look no further than the Blackthorn. Cheers!